Author of The Puzzle Palace, the definitive book on the NSA, which was published under dire threat in 1982 from the NSA.

For Bamford, there is only black and white when it comes to the Foreign Intelligence Surveillance Act, a 1978 law that specifically requires warrants for any NSA wiretapping of U.S. citizens. "If you want to eavesdrop on U.S. citizens, you go to court. If you don't, you go to jail," Bamford says. "If you want to change the law, you go to Congress."